Category: S
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Stress area
Where the natural nail grows beyond the finger and becomes the free edge.
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Strand test
Determines how the hair will react to the color formula and how long the formula should be left on the hair. Deepest, live layer of the epidermis that produces new epidermal skin cells and is responsible or growth.
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Straightening gel
Styling product applied to damp hair that is wavy, curly, or extremely curly, and then blown dry; relaxes the hair for a smooth, straight look.
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Straight rods
Perm rods that are equal in diameter along their entire length or curling area.
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Sternocleidomastoideus
Muscle of the neck that lowers and rotates the head.
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Steamer
A facial machine that heats and produces a stream of warm steam that can be focused on the client’s face or other areas of skin.
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Staphylococci
Pus-forming bacteria that grow in clusters like a bunch of grapes. They cause abscesses, pustules, and boil.
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Squoval nail
A nail with a square free edge that is rounded off at the corner edges.
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Square nail
A nail completely straight across the free edge with no rounding at the outside edges.
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Spray-on thermal protector
Product applied to hair for any thermal service to protect the hair from the harmful effects of blow drying, thermal irons, or electric rollers.